Classical Gas on Piano. This is very hard to get right on piano, and this the one I like the best so far. I Professional pianists tend to add their own trills which aren't part of it, or do it in the wrong key, or get the rhythm wrong. It should start off very simple, like this guy is doing, and then jump into a bunch of chord changes. I also like the fact that this guy is pausing to turn the page. But the ending doesn't sound right.